Extreme Survival and Bushcraft are out on DVD.
World of Survival and Telemark can be found at various online 'sources', but I couldn't condone that.....
Bushcraft and Telemark were recently shown on UKTV History - one sunday they showed Telemark on a loop all day, and another Sunday they showed Bushcraft on a loop - though the episodes were only 45 minutes long as opposed to the hour long ones that were on the DVD and appeared on TV
I've always wanted to see that 'Trips money can't buy' show he did with Ewan MacGregor, but its never been repeated AFAIK